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Wireless sensor and actor networks require efficient coordination mechanisms to perform reliable actions in the physical world. In this paper, an energy and delay aware three-level coordination mechanism is proposed for wireless sensor and actor networks using twolevel hierarchical k-hop clustering algorithm. An optimal number of actors are calculated based on the network area and number of sensors...
In recent years, the use of Wireless Sensor Network (WSN) has been tremendous increased in various fields such as military, environmental, medical, home monitoring and disaster management. In such applications large numbers of nodes are deployed, these nodes work independently and often remain unattended. These nodes sense the data from the environment and communicate the same to the sink or base...
Advances in 3G and 4G technology have offered many possibilities for developing novel applications using sensors embedded in hand held devices like cell phones. Mobility of cell phone based wireless sensor network has a critical issue of gathering sensed information in an energy efficient and delay sensitive manner. In this paper we provide a human mobility based stable clustering algorithm for data...
Energy (battery) of the sensor node is considered as the scarcest resource in Wireless Sensor Network (WSN), hence a communication protocol that efficiently uses the limited energy must be developed. In this paper, Region-based Energy-aware Clustering (REC) scheme is presented to optimize the energy usage, with clustering has been identified as an effective data forwarding technique in WSN. With REC,...
Energy efficiency is the most important issue in wireless sensor networks. To reduce energy consumption, lots of aggregation algorithms were proposed. Since the overlap of detect regions, data aggregation has been extensively investigated for eliminating data redundancy, but it has a great side-effect (such as: latency, accuracy, fault-tolerance). In this paper, we take energy efficiency and latency...
Since wireless sensor actor networks (WSANs) interact with critical physical environments, one of the important issues of WSANs is real-time considerations. Existing WSANs suffer from the lack of a real-time task allocation in support of real-time communication and coordination. In this paper we present a two level task allocation mechanism. We first break end-to-end periodic tasks into real-time...
To satisfying expected coverage degree of application, we derived the smallest active node number K through node active-sleep theory. We also achieved intra-cluster active nodes scheduling algorithm. In data gathering protocol, this algorithm can make vast intra-member nodes obtain sleep, reduce data delay, lighten cluster head burden. The simulated experiment shows that the result of the algorithm...
Expected growth in use and implementation of wireless sensor networks (WSNs) in different environments and for different applications creates new security challenges. In WSNs, a malicious node may initiate incorrect path information, change the contents of data packets, and even hijack one or more genuine network nodes. As the network reliability completely depends on individual nodespsila presence...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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